Results 41 to 50 of about 22,807 (338)

Running performance of an aerodynamic journal bearing with squeeze film effect [PDF]

open access: yes, 2013
Results of theoretical and experimental studies concerning the performance of an aerodynamic journal bearing which running is assisted by squeeze film ultrasonic levitation (SFUL) are presented in this paper.
Ha   +13 more
core   +1 more source

Electrically Tunable On‐Chip Topological Photonics with Integrated Carbon Nanotubes

open access: yesAdvanced Functional Materials, EarlyView.
This work demonstrates electrically tunable on‐chip topological THz devices by integrating 2D carbon nanotube (CNT) sheets with valley‐Hall photonic crystals, enabling broadband transmission modulation (71% modulation depth) and tunable narrowband filtering (0.54 GHz shift) through electrically induced thermal tuning. This advancement paves the way for
Jifan Yin   +7 more
wiley   +1 more source

The Dynamic Model of Plane Mechanism with Variable Ratio. [PDF]

open access: yes, 2016
The paper contains the proposal how to reduce many–elements plane mechanism with one degree of freedom to chosen axis or line as one–element model of mechanism.
Cink, Jacek, Kosucki, Andrzej
core  

A bifurcation study to guide the design of a landing gear with a combined uplock/downlock mechanism [PDF]

open access: yes, 2014
This paper discusses the insights that a bifurcation analysis can provide when designing mechanisms. A model, in the form of a set of coupled steady-state equations, can be derived to describe the mechanism.
Knowles, James A C   +3 more
core   +3 more sources

Golden‐Ratio–Guided Aperiodic Architected Metamaterials with Simultaneously Enhanced Strength and Toughness

open access: yesAdvanced Functional Materials, EarlyView.
Guided by the golden ratio, a class of aperiodic architected metamaterials is introduced to address the intrinsic trade‐off between strength and toughness. By unifying local geometric heterogeneity with global order, the golden‐ratio‐guided aperiodic architecture promotes spatial delocalization of damage tolerence regions, leading to more tortuous ...
Junjie Deng   +9 more
wiley   +1 more source

Electroactive Liquid Crystal Elastomers as Soft Actuators

open access: yesAdvanced Functional Materials, EarlyView.
Electroactive liquid crystal elastomers (eLCEs) can be actuated via electromechanical, electrochemical, or electrothermal effects. a) Electromechanical effects include Maxwell stress, electrostriction, and the electroclinic effect. b) Electrochemical effects arise from electrode redox reactions.
Yakui Deng, Min‐Hui Li
wiley   +1 more source

Dynamic phase transition in the conversion of B-DNA to Z-DNA

open access: yes, 2010
The long time dynamics of the conformational transition from B-DNA to Z-DNA is shown to undergo a dynamic phase transition. We obtained the dynamic phase diagram for the stability of the front separating B and Z.
Bhattacharjee S. M.   +5 more
core   +1 more source

Roll‐to‐Roll Mechanical Exfoliation for Large‐Area van der Waals Films with Preserved Crystallographic Alignment

open access: yesAdvanced Functional Materials, EarlyView.
A roll‐to‐roll exfoliation method is demonstrated that preserves the crystallographic alignment of anisotropic 2D materials over large areas, enabling scalable fabrication of directional electronic and optoelectronic devices. Abstract Anisotropic 2D materials such as black phosphorus (BP), GeS or CrSBr, exhibit direction‐dependent optical and ...
Esteban Zamora‐Amo   +14 more
wiley   +1 more source

Dynamics Simulation and Experiment of the Slider-crank Mechanism with Dry Friction Clearance Joint

open access: yesJixie chuandong, 2017
Based on dynamics simulation software,the dynamics analysis of the slider-crank mechanism with clearance joint is carried out and the effect of joint with different clearance size under dry contact and non-friction conditions on dynamic response of ...
Han Yuncheng, Xu Lixin, Huang Xiaoqiu
doaj  

The effect of the lubricated revolute joint parameters and hydrodynamic force models on the dynamic response of planar multibody systems [PDF]

open access: yes, 2011
In this work a comprehensive methodology for dynamic modeling and analysis of planar multibody systems with lubricated revolute joints is presented. In general, this type of mechanical systems includes journal-bearings in which the load varies in both ...
Costa, João   +3 more
core   +1 more source

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